My kind of Sizing Guide. Hope it helps. These are the sizes I wear Redwing Iron Ranger - 7.5, Merrell - 9 in Intercept, 8.5 in Moab, Saucony - 9, Nike -
Chaco Ramble Puff | Zappos.com
Chaco Size Chart & Fit Guide + Do Chacos Run Big or Small?
Big Kid - Chillos Sport Sandal - Kids Sandals | Chacos
Chaco Z1 Classic Sandals - Sierra Black – Urban Industry
Chaco Men's Odyssey Print Sport Sandal: Amazon.co.uk: Fashion
What size am I? : r/Chacos
How to wear socks with sandals: Birkenstock, Teva, Chaco, and more - Reviewed